lkml.org 
[lkml]   [2022]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] x86/cstate: Add Zhaoxin ACPI Cx FFH MWAIT support
From
Date


On 22/6/2022 21:38, Rafael J. Wysocki wrote:
> Please CC linux-acpi@vger.kernel.org on ACPI-related changes (added now).

Ok.

>
> On Wed, Jun 22, 2022 at 5:29 AM Tony W Wang-oc <TonyWWang-oc@zhaoxin.com> wrote:
>>
>> Recent Zhaoxin CPUs support X86_FEATURE_MWAIT that implies the
>> MONITOR/MWAIT instructions can be used for ACPI Cx state. The BIOS
>> declares Cx state in _CST object to use FFH on Zhaoxin systems. So
>> let function ffh_cstate_init() support Zhaoxin too.
>>
>> Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
>> ---
>> arch/x86/kernel/acpi/cstate.c | 4 +++-
>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
>> index 7945eae..d4185e1 100644
>> --- a/arch/x86/kernel/acpi/cstate.c
>> +++ b/arch/x86/kernel/acpi/cstate.c
>> @@ -213,7 +213,9 @@ static int __init ffh_cstate_init(void)
>>
>> if (c->x86_vendor != X86_VENDOR_INTEL &&
>> c->x86_vendor != X86_VENDOR_AMD &&
>> - c->x86_vendor != X86_VENDOR_HYGON)
>> + c->x86_vendor != X86_VENDOR_HYGON &&
>> + c->x86_vendor != X86_VENDOR_CENTAUR &&
>> + c->x86_vendor != X86_VENDOR_ZHAOXIN)
>
> Centaur is not mentioned in the changelog and it should be.

Will add Centaur in the changelog. Thanks a lot.

>
>> return -1;
>>
>> cpu_cstate_entry = alloc_percpu(struct cstate_entry);
>> --
> .
>

--
Sincerely
TonyWWang-oc

\
 
 \ /
  Last update: 2022-06-23 03:11    [W:0.050 / U:0.688 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site